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Patents for Harry R. Illingworth
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
334,778	Jan. 26, 1886	H.R. Illingworth, J.J. Illingworth	Steam Engine Recorder	industrial recording apparatus
334,779	Jan. 26, 1886	H.R. Illingworth, J.J. Illingworth	Steam Engine Recorder	steam engine indicators

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